Oil-filtering apparatus



(No Mode1.) y y J. DOONBR.

v OIL PILTERING APPARATUS. Y No. 429,340. Patented June 3, 1890:.

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UNITED STATES VATENT OFFICE.

JOHN DOONER, OF CHICAGO, ILLINOIS.

OIL-FI LTER! NG APPARATUS.

SPECIFICATION forming part of Letters APatent No. 429,340, dated J' une3, 1890.

Application filed June 20, 1889. Serial No. 314,915. (No model.)

To all whom it may concern:

Be it known that I, JOHN DOONER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Oil-Filtering Apparatus,of

which I do declare the following to be a full,-

clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification.

My present invention has for its object to.

provide improved mechanism whereby lowgrade or impure lubricating-oilmay be filtered and purified before its use, and whereby alsolubricating-oil that has been used and has thereby accumulated more orless impurities incident to use can be purified, so that it may be usedover and over again for lubricating purposes. This object of invention Ihave accomplished by the novel features of construction hereinafterdescribed,illustrated in the accompanying drawings, and particularlypointed out in the claims at the end of this specification.

Figure l is a perspective view of a purifying apparatus embodying myinvention. Fig. 2 is an enlarged view partly in perspective and partlyin central vertical section through my improved apparatus.

In the preferred embodiment of my invention there are four tanks,designated, re spectively, A, B, C, and D, the tanks A and B beingsustained above the tank C by means of suitable uprights or standards 2of convenient construction.- The tank A, which is shown as ofcylindrical shape, is provided at its top with a removable cover a, thatis preferably furnished with a supplemental lid or4 cover a', and in thebottom of this tank is located a heating-coil 3, that receives steamfrom a steam-pipe 4., a globe-valve 5 serving to control the admissionof steam to the coil 3 and a similar valve 6 serving to control theescape of the steam into the waste-pipe 7, and consequently to regulatethe pressure and temperature of the steam within the tank A.

\ From the main delivery* steam-pi pe et also ex- From this constructionit will be seen that the temperature within each of the tanks A, B, andC can be regulated, for the purposes to be hereinafter stated. The tankAis provided with suitable escape-cocks, (three of such cocks,designated as F, G, and H, being shown in the drawings,) and frombeneath Aeach of these cocks leads a branch pipe 20, which serves todeliver the oil into a main pipe H', that dis- -charges into the top ofthe tank B. Within this tank B is placed a series of riftle plates ortrays b, in any desired number, (tive being shown in the'drawings,)these trays being provided with transverse bars or riffies b', and beinginclined in opposite direction, so that the oil delivered at one end ofthe top plate of thevseries shall flow over each of the succeedingplates before its final delivery into the lower portion of the tank B.The top of -the tank B is provided with a removable cover B', which maybe lifted off when itis necessary to withdraw the rifiie-plates for thepurpose of cleaning them,and by preference, also, this cover B isfurnished witha supplemental lid or cover B2, which canbe lifted fromtime tovtime to permit the engineer to inspect the condition of theplates. In the lower portion of the tank B is placed a discharge-cock K,from which leads the pipe L, that serves to conduct the oil from thetank B to the top ofthe tank O. The top of the tank O is provided with aremovable cover C', which can be withdrawn from time to time when it isnecessary to remove the filter from the tank O for the purpose ofcleaning or renewing it, and by preference, also, the cover C isfurnished with one or more supplemental lids or covers O2, through whichthe engineer can inspect the condition of the filter within the tank C.The pipe Lleads into the cover C of the tank O, immediately above afunnel-shaped filter M, that is connected to v the upper end of the pipem, that extends down to a point adjacent the bottom of the tank C, anduponA this pipe m is fixed the tilter O. This tilter O consists,preferably, of the upper and lower perforated plates or screens o and oand the intermediate pack ing of moss, palm-leaf, or the like, theseperforated plates or screens o and o serving to retain the packing inproper position. In the upper portion of the tank C is placed anescape-cock P, which serves to deliver the oil through the top of thetank D. This tank D is by preference divided into the two compartments Rand R', the compartment R being furnished with an inclined screen S,upon which the oil will be delivered as it passes through theescape-cock P. The partitionwall r, that divides the tank D into thecompartments R and R', is cut away at its bottom and a screen S thereplaced serves to separate the lower portions of the two chambers of thistank. The upper portion of the tank D is provided with the hinged lidsor covers D', which can be lifted from time to time to permit thecleaning of the tanks when necessary. Each of the tanks A, B, and C isfurnished at its bottom with a waste-cock 30, that serves to conductaway the water that accumulates within the tank to the drainpipe W.

From the construction of parts as above deined, the operation of myimproved apparatus will be seen to be as follows: The impul'e oil,either low-grade oil that has not been used or oil that has beencollected after use upon the shafting, engine, or other machinery, isplaced in the tank A, and steam is then admitted through the mainsteam-pipe 4 to the heating-coil 3 within the bottom of this tank, theadmission and escape of the steam being controlled by the valves 5 andG. The oil will be allowed to slowly boil within the tank A for abouttwo hours, more or less, according to its gravi ty and the amount ofimpurities contained therein, care being taken that it docs not boilover, and after the boil ing is completed it should beallowcd to standfor six hours, more or less, until the impurities settle. The cocks F,G, and H will then be successively opened and the oil will be allowed topass .through the pipe Il onto the riliie-platcs b wit-hin the tank l.If, on open ing the cock II, it should be found that water escapesthrough such cock, then the escape cock 30 should be opened topermitthewater to escape until the body of oilfalls below the level of the cockII. By theboiling operation within the tank `A it will be found that theoil has been freed in great measure from much of its impurity, and as itpasses slowly down the series of riiiieplates withinthetan k B thetransverse bars or riliies b of these plates will serve to furtherarrest and collect the impurities from the oil before it finally passesinto the lower portion of this tank B. It' desired, the tank B maybeheated by turning the cocks 14C and l5 in such manner as to permit thepassage of steam from the main steam-pipe Il through the coil or bend llwithin the bottom of this tank. By opening the cock K in the lowerportion of the tank B the oil will be next conducted into the pipe Lthrough the cover C of the tank C and into the filtering-funnel M withinthis tank. This filtering-funnel M will aid in further removing theimpurities from the oil, after which it will pass by the pipe m to thebottom of the tank C, when it will rise through the body of water in thebottom of the tank and up through the perforated plates o and o', andthe intermediate packing of moss or palm leaf, until it reaches theupper portion of the tank. The water and oil within the tank C will beheated during this operation by the steam-coil 13. From the upperportion of the tank C the oil, now freed in great measure from itsimpurities, will be delivered through the escape-cock P into the top ofthe chamber R of the tank D, and will fall upon the screen S beforepassing to the bottom of this chamber. From the bottom of the chamber Rthe oil will pass through the screen S into the bottom of the chamberR', from which chamber it may be drawn oft' from time to time as neededfor use through the cocks 26, 27, and 28. The tank D is furnished at itsbottom with a waste-cock 40, which will serve to withdraw from the tankwhen necessary the water and impurities collected therein. y

The tanks A, B, C, and D may be constructed of any suitable material,although I prefer galvanized iron for the tanks A, B, and C and heavyblock-tin for the tank D.

iVhen it is desired to clean the tanks, the pipe II, that connects thetank A with the tank B, will be disconnected,so that the cover of thetank D can be removed to permit the withdrawal of the riflie-platestherefrom, and in like manner the pipe L, that connects the tank B withthe tank C, can be disconnected in order to permit the cover C of thetank C to be lifted olf, so that the iilter O can be withdrawn when thetank is to be cleaned or a new filter is to be substituted.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In an oil-liltering apparatus, the combination of a tank. A, providedwith a steamheating pipe, whereby the boiling of the impure oil withinthe.tank may be effected, and provided with a discharge-cock for oil ata distance above its bottom and a wastecock for sediment and the like atits bottom, and a tank B, arranged beneath said tank A and having a pipeleading thereto from the discharge-cock of the tan kA at a distanceabove its bottom, whereby the partially-purified oil may be withdrawnfrom the tank A to be further purified within the tank I3, while theimpurities resulting from the boiling' of the oil may be withdrawn fromthe bottom of the tank A and be prevented from passing into the tank B,substantially as described.

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1o A and B, whereby the oil, after having been boiled and allowed tosettle Within the tank A, may be Withdrawn into tank B and passed overthe ritiie-plates sufficiently reheated to secure tle desired fluidity,substantially as described.

JOHN DOONER.

Witnesses:

GEo. P. FISHER, J r., I. B. CARPENTER.

